If you are using LMT then do not specify INITIAL or NEXT for each table. They are treated as hints, not commands.
If you do specify INITIAL for a table in a LMT, then Oracle creates N extents of the default size (specified at the LMT level, not the table level) that are equal to the size you specified for INITIAL. For example, if I have a LMT with AUTOALLOCATE so that the first group of extents is 64 KB, and I specify INITIAL = 512K, then Oracle creates 8 extents of 64 KB each.
Most storage parameters act as hints with LMT, and not commands. Consider the following example of MINEXTENTS.
Oracle took the number of extents I wanted and converted that into a space request. It then reconverted the space request into a number of auto-sized extents. Since the calculated number of extents was greater than some number, Oracle switched from 64K extents to 8M extent sizes.
I hope this helps. See the OCP study guides for lots of examples on this.