this shoe is coming apart at the inside of the foot bed??

Have same problem. Sent back to Teva and they replaced them. 2nd pair has done the same thing after less than a year. Have worn Teva shoes for 10 years or more. Pricey but have lasted. Don't think they are making in the USA anymore. Quality has suffered, in my experience.

I wear a 10.5. should I order the 10 or the 11? ( I know it's a dumb question)

Not a dumb question at all. I usually wear 10.5 shoes and have a wider than average foot, but found that Teva 10's fit me perfectly. I recently bought these in a 10 and they fit great.