Tier2 (ICT + General Dependent) to ILR

Hi,
I have been in UK on a Tier 2 ICT Visa since 23rd Mar 2010. I have had 2 extensions on that Visa and have not been out of UK for more than 2 months continuously in 1 year. I have been on maternity leave since Aug 2013 and my current visa will expire on 11th Sept 2014. I understand I need at least another 1 yr extension to qualify for ILR. I am not sure if I will get another extension from my company.
My husband is here since 1st June 2011 on a Tier 2 General Visa and his company will now extend his visa and have asked if he wants to include dependents in his application. So we have to make an immediate decision. My question is:
1) If I do get an extension from my own company, will the fact that I had been on maternity leave and hence not earning my full salary for 7 months affect my application for ILR?
2) If I now change to Tier 2 General Dependent Visa, will my previous stay on Tier 2 ICT count towards my 5 year requirement for ILR - 4 yrs 3 months ( ICT ) + 9 months ( Tier 2 General )?

We are trying to get our head around on what is the best course? Please give us some guidance.

Thanks,
Lopa