Yes, punctuation is different between Russian and English. Russian doesn't use commas sometimes, where English would. Sometimes it uses commas where English would not..

I decided to leave this for later. People understand, even if the commas are not in the right place.

You should be aware that a lot of native English speakers are really bad at English grammar and make mistakes when writing. Also, lots of people use English as a second language (like me, for example, and bitpicker on this forum).
Their English may be very good, but not 100% perfect.