That’s not legal jargon at all, it’s just laid out really badly and uses terms defined at the beginning, just like many contracts. Here’s a better site. I urge you to persevere and keep reading through it – sometime in your life you will be met with a similar contract and not have Flutherites to help you out. That’s when you get a lawyer :)
Because it has been more than two months since the injury occurred, and nothing was filed at the time of injury I assume (and this is a critical assumption, as section 121.5 details), worker’s compensation may not be applicable to you. Your employer offering to help with your doctor costs is not necessarily related to worker’s compensation at all.
I would love to go through the PA code, but really I have no time to do that for you. You may want to contact the board, although they do not provide legal advice, they may be able to answer some of your questions:
(6) The Bureau of Workers’ Compensation cannot provide legal advice. However, you may contact the Bureau of Workers’ Compensation for additional general information at: Bureau of Workers’ Compensation, 1171 South Cameron Street, Room 103, Harrisburg, Pennsylvania 17104–2501; telephone number within Pennsylvania (800) 482–2383; telephone number outside of this Commonwealth (717) 772–4447; TTY (800) 362–4228 (for hearing and speech impaired only); www.state.pa.us, PA Keyword: workers comp.
If I were in your position I wouldn’t bother worrying about whether it will be denied or not, but simply apply for it anyway. It’s not like you have an alternative anyways with no personal insurance. The fact that you are more than two months from the injury will hinder your case, but does not mean it ends there.
It’s not a matter of them screwing you over, it’s a matter of them protecting themselves from being screwed over by you.