i totally agree with you that iqbal was in favour of wehdat tul wajood in his ealry period but my dear the problem is that the iqbal presented before us by our damp fool historians is a molvi iqbal not an enlightened iqbal. you can read sabt e hasan's book battle of ideas in pakistan in which he he has given a nice analysis on iqbalism. and ali abbas jalal puri has written a marvelous book on iqbalism the book is "iqbal ka ilm-e-kalam" this book will provide answer to all your questions and another book written by doctor mubarak ali almya e tareekh in this book doctor mubarak has given a historical development of ideas of iqbal.