Contradiction with Exodus 26:1
Exodus 26:1 initially describes the construction instructions that are later mentioned in Exodus 36:26.
Exodus 26:1: Moreover thou shalt make the tabernacle [with] ten curtains [of] fine twined linen, and blue, and purple, and scarlet: [with] cherubims of cunning work shalt thou make them. [of cunning...: Heb. the work of a cunning workman, or, embroiderer]
Contradiction with Exodus 36:13
This verse describes a separate construction detail similar to Exodus 36:26 but does not directly contradict it.
Exodus 36:13: And he made fifty taches of gold, and coupled the curtains one unto another with the taches: so it became one tabernacle.
Contradiction with Exodus 36:29
This is a related construction detail from the building of the tabernacle that corresponds to the construction instructions.
Exodus 36:29: And they were coupled beneath, and coupled together at the head thereof, to one ring: thus he did to both of them in both the corners. [coupled: Heb. twinned]
Contradiction with Exodus 26:28
Like Exodus 36:26, discusses the boards' connections but with slight variations in descriptions.
Exodus 26:28: And the middle bar in the midst of the boards shall reach from end to end.
Contradiction with Exodus 26:23-24
Provides similar instructions for constructing the tabernacle as described in Exodus 36:26, with no overt contradictions.
Exodus 26:23-24: And two boards shalt thou make for the corners of the tabernacle in the two sides.