Gusset decreases

This is the pattern I’m basing my socks on. http://cache.lionbrand.com/patterns/60050.html
Different yarn, more stitches to fit over my foot and double knitting on DPNs, but that’s the flap and turn.

This is where I’m running into a problem with their numbers.

Turn Heel
…Continue to work in this manner, having 1 more st before decs on each row until 12 sts remain.

Gussets
With first needle, knit across 12 sts of heel, pick up and k 12 sts along side of heel flap, M1 between heel flap and next (instep) needle, with second needle, work 20 sts across 2 instep needles, with third needle, M1 between instep needle and heel flap, pick up 12 sts along remaining side of heel flap, work across 19 sts of heel flap – 58 sts. Place marker for beg of rnd.
Dec Rnd K 17, k2tog, k 20, k2tog, k 17.
Knit 1 rnd.
Rep last 2 rnds until 40 sts remain.

I count up their numbers and I get 58sts.
But going across 19sts after picking up the final 12st puts me somewhere on the side of the heel flap, near but not where I think the decrease should be. 17sts from there puts me on the top of the foot. 20sts from there puts me near the bottom of the heel.
Then the K17 + K17 never changing with the decreases has them spiraling around the foot.

Judging from the crochet socks I made, the decreases should come the two stitches on the heel flap before and after the corner.
I think that’s what they’re getting at but their “19sts” is wrong. It should be 6 to put me in the middle of the heel and 17sts from there would put me 2 from the corner. Then the 20sts should stay the same but for every decrease round each 17sts should decrease by 1.

If I am correct I’ll simply place a marker in each corner and decrease 2 before the first and 2 after the second.

2nd question
My crochet sock gusset fit pretty bad following the pattern. The pattern fit much better when I decreased every row or twice per corner in each decrease row.
Should I figure a standard knit sock pattern will be sized the same? If so would it be better to K2tog every row or K2tog side by side and then work the even row?

Yes it does look like that pattern has a few errors.
Maybe this will help. It’s just the numbers for various heels.
http://www.socknitters.com/Tips/heels_by_the_number.htm
(Also great if you want to change the style of heel on a pattern.)

Thanks.

I found where I saved Silver’s sock tutorial. The gusset seems to be the same as the crochet socks other than the heel turn (plus I don’t need to use markers, the DPNs are the markers).

I might have to try that site and just make some heel turns to see which I like the best.

I think I’ll throw a lifeline in so if the gusset doesn’t fit I can frog it back. I think it’s only 10-20 rows depending on how fast I decrease. I can probably get a good estimate to shoot for by measuring the crochet socks and mathing the row guage to that length.