Income limits for SSDI

[Lil Missy]

I recently researched the income limits for a person getting SSDI. I found that any month of income over $770 for SSDI is considered a "trial month". Then monthly income over $1070 is considered "Substantial Gainful Activity" (SGA)

http://www.disabilitysecrets.com/page1-5.html

I noticed on another thread that SSDI isn't affected unless making over $1000 a month:

http://www.democraticunderground.com/114127#post1

"Work is only an issue if you are working more then 30 hours a week or making more then $1000 a month."

Last year I initiated part-time employment and until this month I made under $770 a month. Until this month - I made closer to $900 - well over the $770 threshold but under the $1070 limit considered SGA. So my question is - have I triggered a trial work period by going over $770 this month?